Processing unit
CA 2046624 A1 · Owner: Pummell, Leslie James Horace · Inventors: Ward, Paul Courtenay; Marshall, Geoffrey Douglas; Pummell, Leslie James Horace
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The critical time in photographic processing apparatus is the time from when the first part of photographic material enters the apparatus to when the last part leaves the apparatus. During this time there are periods of time in which no processing takes place for example, as the material is passed from one stage to the next. Described herein is a processing unit which minimises the periods of time during which no processing is taking place. The unit comprises a processing tank (6) having processing solution (4) retained therein. Material (S) is fed into the tank (6) along a path (2), and around a looped path (8) until reaches a point (10) at which the material (S) can be deflected out of …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed February 1, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 1, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 1, 2012.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.